用ajax自动加载blogjava和博客园的rss

bsp;  link=item.getElementsByTagName("link")[0].firstChild.nodeValue;
        title = item.getElementsByTagName("title")[0].firstChild.nodeValue;
        author=item.getElementsByTagName("author")[0].firstChild.nodeValue;
        pubDate= item.getElementsByTagName("pubDate")[0].firstChild.nodeValue;
       // description=item.getElementsByTagName("description")[0].firstChild.nodeValue;
        var cell = document.createElement("div");
        cell.innerHTML="<a href="+link+" target=_blank>"+title+"</a><font color=red>     作者:</font>"+author+"<br>";

      
       document.getElementById("result").appendChild(cell);
       //var cell1=document.createElement("div");
       //cell1.innerHTML=description;
       // document.getElementById("result").appendChild(cell1);
    }
}
function readrss1()
{
    var url=document.getElementById("txturl").value;
    if(url=="")
    {
        alert("请输入RSS地址");
        }
    else
        {
            readRSS(url);
            }
    }

        var i=1;
        var j=0;
    function read()
    { 
        if(j==0)
        {
              readBlogjava();
           window.setTimeout("testRead()",100);
        }
    }

    function testRead()
    {
        window.setTimeout("read()",1000);
    }

    function readBlogjava()
    {
            switch(i)